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Method for preparing porous carbon composite material by utilizing silk screen as framework

A composite material and porous carbon technology, applied in the field of porous materials, can solve the problems of application obstacles, complicated operation, low product utilization rate, etc., and achieve the effects of simplified production process, high efficiency and easy operation

Active Publication Date: 2015-05-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, there are still many limitations in this method: for example, it is necessary to scrape and collect the product from the surface of the substrate, and then carry out subsequent processing; in practical applications, it still needs to be processed, there are many steps, and the utilization rate of the product is low, etc.
For this reason, although it has also been proposed to use the hydrothermal method to assemble porous polymer materials first, and then prepare nanoporous carbon materials by carbonization, this method has a long reaction cycle, complicated operation, and the obtained material has a small pore size. application barriers
These shortcomings have caused inconvenience to the large-scale production and wide application of nanoporous carbon materials.

Method used

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  • Method for preparing porous carbon composite material by utilizing silk screen as framework
  • Method for preparing porous carbon composite material by utilizing silk screen as framework
  • Method for preparing porous carbon composite material by utilizing silk screen as framework

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1, with nickel-chromium alloy screen as skeleton, surfactant F127 as the system of porogen, the step of preparing porous carbon composite material is as follows: 2g F127 is dispersed in 50g ethanol; Dissolved into 0.5g again Hydroxypropiophenone and 1.5g phenolic resin polymer were stirred at 28°C for 1 hour to obtain a sol, and then the sol was attached to an area of ​​0.2m 2 , 200-mesh nickel-chromium alloy wire mesh. , and allowed the solvent to evaporate at 28°C for 10 hours. The resulting screen was placed in an oven at 120° C. for thermal polymerization treatment for 18 hours to obtain a composite material formed of F127 / polymer / screen. Then put the silk screen in a nitrogen-filled tube furnace and bake it at 630°C for 3 hours with a heating rate of 0.5°C / min to obtain a porous carbon composite material. Nitrogen adsorption and desorption isothermal tests show that the porous carbon composite has a mesopore diameter of 4.2nm and a pore volume of 0.08c...

Embodiment 2

[0035] Embodiment 2, with nylon screen as skeleton, nonionic surfactant F127 as porogen, the steps of synthesizing porous carbon composite material are as follows: 10g F127 is dispersed in 200g ethanol evenly; Then with 20g phenolic resin polymer Mix and stir at 25°C for 2 hours to obtain a sol; then attach the sol to an area of ​​1m 2 1. On a nylon screen with a mesh number of 200, the solvent was volatilized at 30° C. for 7 hours. The resulting screen was placed in an oven at 120° C. for aging for 24 hours to obtain a material formed of F127 / polymer / nylon screen. The screen was then placed in a tube furnace and roasted in nitrogen at 600°C for 3 hours at a heating rate of 0.5°C / min to remove the porogen and carbonize to obtain a porous carbon composite material. The nitrogen adsorption-desorption isotherm and pore size distribution show that the mesopore diameter is 4.1nm and the pore volume is 0.33cm 3 / g, the specific surface area is 550m 2 / g. The macropores are about...

Embodiment 3

[0036] Embodiment 3, with glass fiber network as skeleton, surfactant cetyltrimethylammonium bromide (CTAB) and F127 are as composite porogen, the step of synthesizing porous carbon composite material is as follows: 4.5gCTAB and 6g F127 Evenly dispersed in the mixed solution formed by 25g of methanol, then mixed with 7g of phenolic resin polymer, stirred at room temperature for 2 hours. 1 g of p-hydroxyamphetamine was then added, and the sol was obtained after continuous stirring at 40° C. for 100 minutes. The sol was then attached to an area of ​​1.5m 2 1. On a glass fiber net with a mesh number of 300, the solvent was evaporated at 30° C. for 5 hours. The obtained sponge was aged in an oven at 120° C. for 24 hours. A composite material formed by porogen / polymer / silk mesh is obtained. The glass fiber mesh was baked in a tube furnace with nitrogen flow at 650° C. for 3 hours with a heating rate of 0.5° C. / min to form a porous carbon composite material. The nitrogen adsorpt...

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Abstract

The invention provides a method for preparing a porous carbon composite material by utilizing a silk screen as a framework. The preparation method comprises the following steps of: adding a surfactant into a solvent to obtain a surfactant solution; adding a carbon source while agitating under strong to enable the carbon source to be dispersed into the surfactant solution to obtain sol; attaching the sol to the silk screen and placing at a room temperature to promote the solvent to volatilize; co-assembling to obtain a nano-pore structure; carrying out heat polymerization machining to form the composite material by the surfactant, the carbon source and the silk screen; and removing the surfactant in an inert atmosphere and carbonizing at a high temperature to obtain the porous carbon composite material. The method disclosed by the invention takes the silk screens or screening nets made of different materials as the frameworks to prepare the carbon composite material with a multi-grade pore structure; the method is low in cost and is time-saving and labor-saving; a product is convenient to mould and is wide in applicability.

Description

technical field [0001] The invention relates to the field of porous materials, in particular to a method for preparing a carbon composite material with a multi-level pore structure by using wire mesh or screen mesh of various materials as a skeleton. Background technique [0002] Nanoporous materials assembled with surfactants as porogens have large specific surface area and pore volume, adjustable pore size and controllable morphology. It has broad application prospects and has been widely valued by people. In this large family of nanoporous materials, carbon materials with hierarchical porous structures are more attractive. In addition to the above-mentioned excellent properties, carbon materials with hierarchical pore structures also show broad application prospects in new energy fields such as capacitors, solar cells, lithium batteries, and fuel cells. In the past, nanoporous carbon materials were prepared by using nanoporous silicon oxide as a hard template, selecting...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/05
Inventor 薛春峰沈小华谷红兵肖波
Owner TAIYUAN UNIV OF TECH